Is this odd? Or is it just me?

Ended my 8 month relationship yesterday evening. This morning I received an email from him that said "I'm not bothered because I saw it coming. I'm honestly not upset". He didn't say much else but isn't it odd to write an email like that? I hadn't written one to him, it just came out of nowhere.Is he trying to have a go at me or is he just acting cocky or something?